#!/usr/bin/python
# Copyright 2010 Google Inc.
# Licensed under the Apache License, Version 2.0
# http://www.apache.org/licenses/LICENSE-2.0

# Google's Python Class
# http://code.google.com/edu/languages/google-python-class/

import sys
import re

"""Baby Names exercise

Define the extract_names() function below and change main()
to call it.

For writing regex, it's nice to include a copy of the target
text for inspiration.

Here's what the html looks like in the baby.html files:
...
<h3 align="center">Popularity in 1990</h3>
....
<tr align="right"><td>1</td><td>Michael</td><td>Jessica</td>
<tr align="right"><td>2</td><td>Christopher</td><td>Ashley</td>
<tr align="right"><td>3</td><td>Matthew</td><td>Brittany</td>
...

Suggested milestones for incremental development:
 -Extract the year and print it
 -Extract the names and rank numbers and just print them
 -Get the names data into a dict and print it
 -Build the [year, 'name rank', ... ] list and print it
 -Fix main() to use the extract_names list
"""

def extract_names(filename):
  """
  Given a file name for baby.html, returns a list starting with the year string
  followed by the name-rank strings in alphabetical order.
  ['2006', 'Aaliyah 91', Aaron 57', 'Abagail 895', ' ...]
  """
  # +++your code here+++
  fi = open(filename)
  if not fi:
    return None
  reg = r'([0-9]+)</td><td>([a-zA-Z]+)</td><td>([a-zA-Z]+)</td>'
  listOfTuple = re.findall(reg, fi.read())
  # [('1', 'Jacob', 'Onebook'), ('2', 'Michael', 'Madison')]
  rankDic = {}
  for ts in listOfTuple:
    for name in ts[1:]:
      updateRank(rankDic, name, ts[0])
  lastRank = [re.search(r'[0-9]{4}', filename).group()]
  nameList = sorted(rankDic.keys())
  for name in nameList:
    lastRank.append(name + ' ' + rankDic[name])
  return lastRank
  
def updateRank(rankDic, name, rank):
  if name in rankDic:
    return
  rankDic[name] = rank
  return

def main():
  # This command-line parsing code is provided.
  # Make a list of command line arguments, omitting the [0] element
  # which is the script itself.
  args = sys.argv[1:]

  if not args:
    print('usage: [--summaryfile] file [file ...]')
    sys.exit(1)

  # Notice the summary flag and remove it from args if it is present.
  summary = False
  if args[0] == '--summaryfile':
    summary = True
    del args[0]

  # +++your code here+++
  # For each filename, get the names, then either print the text output
  # or write it to a summary file
  for afile in args:
    rankList = extract_names(afile)
    if rankList:
      toFile(afile + '.re', '\n'.join(rankList))
  return
def toFile(filename, data):
  afile = open(filename, 'w')
  afile.write(data + '\n')
if __name__ == '__main__':
  main()
